Browsing ELibrary by Subject "D" LAYER"

Browsing ELibrary by Subject "D" LAYER"

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  • IS THERE A FIRST-ORDER DISCONTINUITY IN THE LOWERMOST MANTLE? 
    Liu X.F.; Tromp J.; Dziewonski A.M. (1998)
    In 1983, Lay and Helmberger [Geophys. J. R. Astron. Soc. 75 (1983) 799-837] reported the detection of a precursor to the seismic phase ScS. They attributed this precursor to a sharp seismic discontinuity located several ...